Operating instructions - EWM Hightec Welding GmbH

Commissioning
TIG welding
6.7.4.1 Connecting the shielding gas supply
1
Item Symbol Description 0
Figure 6-4
1 G¼” connecting nipple
Shielding gas connection on the pressure reducer
• Screw gas hose connection crown nut onto the output side of the pressure reducer.
• Screw the gas hose connection nipple onto the G¼" connection nipple.
6.7.4.2 Setting the shielding gas quantity
CAUTION
Electric shocks!
When setting the shielding gas quantity, high voltage ignition pulses or open circuit
voltage are applied at the welding torch; these can lead to electric shocks and burning
on contact.
• Keep the welding torch electrically insulated from persons, animals or equipment during the
setting procedure.
NOTE
Rule of thumb for the gas flow rate:
Diameter of gas nozzle in mm corresponds to gas flow in l/min.
Example: 7mm gas nozzle corresponds to 7l/min gas flow.
Incorrect shielding gas setting!
If the shielding gas setting is too low or too high, this can introduce air to the weld pool
and may cause pores to form.
• Adjust the shielding gas quantity to suit the welding task!
• Slowly open the gas cylinder valve.
Conduct a gas test (see chapter "Function specification / gas test")
• Set the required amount of shielding gas on the pressure reducer, about 4 - 15 l/min depending on the
current strength and the material.
Item No.: 099-000097-EWM01 63